foo.cc: In constructor 'Time::Time()':
foo.cc:11:21: warning: unused variable 'h' [-Wunused-variable]
   11 |                 int h,m,s;
      |                     ^
foo.cc:11:23: warning: unused variable 'm' [-Wunused-variable]
   11 |                 int h,m,s;
      |                       ^
foo.cc:11:25: warning: unused variable 's' [-Wunused-variable]
   11 |                 int h,m,s;
      |                         ^